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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 516 · 40 questions
TalentJR

How to do it in your head ((a + b)²): Split: 27 = 20 + 7. Find 20² = 400, 2 × 20 × 7 = 280 and 7² = 49. Add, biggest first: 400 + 280 + 49.

NameDateTime takenScore ___ / 40
  1. 1.29² =
  2. 2.17² =
  3. 3.18² =
  4. 4.12² =
  5. 5.23² =
  6. 6.22² =
  7. 7.14² =
  8. 8.21² =
  9. 9.26² =
  10. 10.25² =
  11. 11.24² =
  12. 12.13² =
  13. 13.16² =
  14. 14.27² =
  15. 15.11² =
  16. 16.28² =
  17. 17.15² =
  18. 18.19² =
  19. 19.16² =
  20. 20.12² =
  21. 21.18² =
  22. 22.28² =
  23. 23.15² =
  24. 24.15² =
  25. 25.21² =
  26. 26.19² =
  27. 27.24² =
  28. 28.23² =
  29. 29.16² =
  30. 30.19² =
  31. 31.24² =
  32. 32.18² =
  33. 33.23² =
  34. 34.22² =
  35. 35.23² =
  36. 36.21² =
  37. 37.14² =
  38. 38.25² =
  39. 39.18² =
  40. 40.11² =

Answer key

  1. 841
  2. 289
  3. 324
  4. 144
  5. 529
  6. 484
  7. 196
  8. 441
  9. 676
  10. 625
  11. 576
  12. 169
  13. 256
  14. 729
  15. 121
  16. 784
  17. 225
  18. 361
  19. 256
  20. 144
  21. 324
  22. 784
  23. 225
  24. 225
  25. 441
  26. 361
  27. 576
  28. 529
  29. 256
  30. 361
  31. 576
  32. 324
  33. 529
  34. 484
  35. 529
  36. 441
  37. 196
  38. 625
  39. 324
  40. 121

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